body ,html
  line-height :1
  font-weight :200
  font-family "PingFang SC", "Helvetica Neue", Helvetica, STHeiTi, Arial, sans-serif

.clearfix
  display: inline-block;
  &:after
    content: '';
    display: block;
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
